如何处理返回按钮在自定义视图中在android中？

Question

relativeLayout.setOnKeyListener(new View.OnKeyListener() { 
      @Override 
      public boolean onKey(View v, int keyCode, KeyEvent event) {     
       if(keyCode == KeyEvent.KEYCODE_BACK) {    
         do....something     
       } 
       return false; 
      } 

}

此代码无效。当我按下后退按钮时，它不显示任何响应。请任何人帮助我。在此先感谢......

Answer 1

你几乎在那里，但这是你需要做的事。

relativeLayout.setFocusableInTouchMode(true); 
relativeLayout.requestFocus(); 
relativeLayout.setOnKeyListener(new View.OnKeyListener() { 
    @Override 
    public boolean onKey(View v, int keyCode, KeyEvent event) { 

     if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) { 
       if(You have handled the back press in your View){ return true; } 
       return false; 
     } 
    }); 

Answer 2

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
if (Integer.parseInt(android.os.Build.VERSION.SDK) > 5 
     && keyCode == KeyEvent.KEYCODE_BACK 
     && event.getRepeatCount() == 0) { 
    Log.d("CDA", "onKeyDown Called"); 
    // do stuff on back key press event 
    return true; 
} 
return super.onKeyDown(keyCode, event); 

}

同样可以使用的onkeyup根据您的需要重写方法。